It takes a long time to improve our listening. 3 months is far from enough. We have to listen every day. I mean every day, even in our holiday or on the Spring Festival. As long as we stay with the language, we will improve. The process is slow but the progress is steady.
Also listening has something to do with our knowledge about the world and our common sense. The more we know about the world, the more easily we will understand.
Keep up our efforts.
Shengliver Studio 
my listening is worse than my speaking. i only listened for a short time everyday using MP3 when i was in the school before. sometime i met a new word ,i could stoped listening and thought over the meaning of the new word.